package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService{

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    //根据id删除,删除前判断
    @Override
    public void remove(Long id) {
        //根据分类id查询是否关联菜品
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Dish::getCategoryId,id);
        int count = dishService.count(lqw);

        //如果已经关联抛出一个业务异常
        if (count >0){
            throw new CustomException("当前分类下还有菜品,不能删除");
        }

        //查询当前分类是否关联了套餐
        LambdaQueryWrapper<Setmeal> lqw1 = new LambdaQueryWrapper<>();
        lqw1.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(lqw1);

        //如果已经关联，抛出一个业务异常
        if (count1 > 0){
            throw new CustomException("当前分类下还有套餐,不能删除");
        }
        //正常删除
        super.removeById(id);
    }
}